Add pull_request_template.md

[ravikiranchollangi]

Motivate of the pull request

• To address an existing issue. Adds new PR template

Describe the technical details

What is currently done? (Provide issue link if applicable)

There is no PR template, this is a first iteration of it.

What does this pull request change?

Added a pull_request_template.md to .github root location as per https://docs.github.com/en/communities/using-templates-to-encourage-useful-issues-and-pull-requests/creating-a-pull-request-template-for-your-repository

Which part of the code base require a change

• Library:
• Plug-in:
• Engine
• Documentation
• Regression tests
• Continuous Integration (CI) scripts

Impact of the pull request

None

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 14.75%. Comparing base (ec211a3) to head (a49a588).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1634   +/-   ##
=======================================
  Coverage   14.75%   14.75%           
=======================================
  Files         475      475           
  Lines       63224    63224           
  Branches    25620    25620           
=======================================
  Hits         9330     9330           
- Misses      52687    52689    +2     
+ Partials     1207     1205    -2     

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